linkster and brf,
from the mmi there would be a change in the wiring harnesses, jumpers and rc wiring to clear geometry cables.
for the mm, i would need to look at the tweeter face plate to see whether it conforms to present specs, the q circuit in the hf network to see if it is present spec and the woofer coating. we also clean the lead/old solder from all of the crossover parts and change the connecting rods on the terminals. then rewire with the clear gemotery cables.
the second is more complicated and more work.
bobby